Hangs on this, here is what the logs are constantly ship 
[2016-10-30 11:25:57] 'Bitcoin' has started the backup!
[2016-10-30 11:25:57] Marking backup as running...
[2016-10-30 11:25:57] Making sure '/var/www/discourse/tmp/backups/default/2016-10-30-112557' exists...
[2016-10-30 11:25:57] Making sure '/var/www/discourse/public/backups/default' exists...
[2016-10-30 11:25:57] Backup process was cancelled!
[2016-10-30 11:25:57] Notifying 'Bitcoin' of the end of the backup...